No sex.usually have regular cycle.3 weeks-have had cramps,nausea,acne,bloating, sore swollen breasts,odd very light/3 day bleeding,pee lots, fatigue.

Need to see..: .. a gynecologist or family practitioner ASAP. Cramping with the other symptoms may mean you are going through some flux in your hormone levels, though if you have not had vaginal sex it is unlikely that you would be pregnant. I would check a pregnancy test anyway to be sure... you never know :) Then check a blood sugar to make sure you are not diabetic. Then see a MD for proper diagnosis.